Hi!

I run into trouble with undo/redo on 9.0.2.1640.

Although the running instance continues messy undo/redo changes, I can't reproduce that in new instance and I can't remember how I got there.
Basically I have a "large" (215 KB) sql file holding view definitions and a bunch of other windows with single view "views", opened package sources, etc.

What I did,
was editing views, giving comments, partial highlight and apply views of this sql window and in between, test some sql results with full fetch of up to 3000 rows.
I also switched connection/ window connection to another db and back.
All in all not that big deal.

State of the art is now:
Using undo/redo fills or removes letters or text blocks in random positions. Since I lost track, I can't even tell, that this letters are something, I typed or deleted earlier.

Did somebody have similar effects?